工业热过程中无意生成持久性有机污染物的自由基转化机制  

Free-radical mediated formation mechanisms of unintentionally produced persistent organic pollutants in industrial thermal processes

作　　者：林炳丞 王枭 王健 金蓉[1,2] 马云峰 刘国瑞 郑明辉 LIN Bingcheng;WANG Xiao;WANG Jian;JIN Rong;MA Yunfeng;LIU Guorui;ZHENG Minghui(School of Environment,Hangzhou Institute for Advanced Study,UCAS,Hangzhou,310024,China;State Key Laboratory of Environmental Chemistry and Ecotoxicology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing,100085,China)

机构地区：[1]国科大杭州高等研究院环境学院,杭州310024 [2]中国科学院生态环境研究中心环境化学与生态毒理学国家重点实验室,北京100085

出　　处：《环境化学》2024年第11期3665-3677,共13页Environmental Chemistry

基　　金：国家自然科学基金(22106029,21936007);浙江省重点研发计划(2021C03176)资助.

摘　　要：掌握无意生成持久性有机污染物(unintentionally produced persistent organic pollutants,UPOPs)的生成机制对于其在典型工业热过程中的源头控制具有重要意义,现有对二噁英等UPOPs生成机制的研究主要是基于反应后稳定化合物和目标同类物分布的检测,缺乏对自由基中间体的研究.环境持久性自由基(environmentally persistent free radicals,EPFRs)是一类新的环境污染物,其半衰期可达数月,可在环境样品以及二噁英生成过程中检出.近年来EPFRs被认为是UPOPs生成的重要自由基中间体.本文对UPOPs生成过程中前驱体种类、金属化合物、温度、反应气氛等对EPFRs生成特性的影响作用进行了综述,分析了前驱体生成UPOPs过程中同种或不同种EPFRs的转化路径.此外,基于现有UPOPs源头阻滞技术,提出了UPOPs与EPFRs协同控制的潜在方法.It is of great significance to master the formation mechanisms of unintentionally produced persistent organic pollutants(UPOPs)for its source control in typical industrial thermal processes.Existing studies on the formation mechanism of UPOPs,e.g.dioxins,are mainly based on the detection of stable compounds and target congeners after reaction,but the detection of free-radical intermediates is lacking.Environmentally persistent free radicals(EPFRs)are a new class of environmental pollutants with a half-life up to several months.They can be detected in environmental samples and dioxin formation processes.EPFRs have been recognized as important free-radical intermediates for UPOPs generation in recent years.In this paper,the critical effects of precursor species,metal compounds,temperature and reaction atmosphere on the formation characteristics of EPFRs are reviewed.The conversion pathways of various EPFRs to UPOPs from different precursors are analyzed.In addition,based on the current UPOPs control technology,a potential method for synergistic control of UPOPs and EPFRs is proposed.

关 键 词：工业热过程 持久性有机污染物 环境持久性自由基 生成机制 协同控制 

分 类 号：X-1[环境科学与工程] O6[理学—化学]